Aluminum powder dust removal equipment: a professional solution for risk prevention and efficient purification
Jul 11,2025
Aluminum powder, as an important industrial raw material, is widely used in coatings, pigments, fireworks, metallurgy and other fields. However, aluminum powder generates a large amount of dust during processing such as grinding, screening, mixing, and packaging. These dust particles are not only small in size and easily suspended and diffused, but also highly flammable and explosive. When the concentration of aluminum powder in the air reaches 40g/m ³, it may cause a violent explosion when exposed to open flames, electrostatic sparks, or frictional heat. Therefore, aluminum powder dust removal equipment needs to meet the dual requirements of efficient purification and safety explosion prevention, which is the core equipment to ensure production safety.
Characteristics and treatment difficulties of aluminum powder dust
The particularity of aluminum powder dust poses multiple challenges to dust removal work.
Firstly, the risk of explosion is extremely high. Aluminum powder belongs to Class B combustible dust, with a minimum ignition energy of only 15mJ, and has a fast combustion rate and high explosion pressure. Once an explosion occurs, the consequences are serious;
Secondly, it is prone to oxidation and spontaneous combustion. Aluminum powder is chemically active and may undergo slow oxidation when in contact with air or water vapor. If the heat generated during accumulation cannot be dissipated, it may trigger spontaneous combustion;
Thirdly, conductivity and adsorption properties. Aluminum powder has a certain degree of conductivity, but if dust accumulates, static electricity will accumulate; At the same time, the surface of aluminum powder particles is smooth and light, which is easy to adhere to the surface of the filter material. Ordinary dust cleaning methods are difficult to completely remove, which can easily lead to an increase in equipment resistance;
Fourthly, the recycling value is high, and the cost of aluminum powder raw materials is high. Efficient recycling can reduce waste and improve economic benefits.
Types and technological advantages of aluminum powder dust removal equipment that are compatible
1. Explosion proof pulse bag filter
Explosion proof pulse bag filter is the mainstream choice for aluminum powder dust removal, and its core advantage lies in the combination of high-precision filtration and explosion-proof design. The filter bag is made of anti-static material with a resistance value of ≤ 10 Ω, which can effectively release static electricity and avoid spark generation; The shell of the dust collector is welded with 16MnR steel plate, with a thickness of ≥ 8mm, and can withstand an explosive pressure of 0.15MPa; Equipped with flameless venting device and explosion-proof valve, it can quickly release pressure and block flame propagation in case of explosion; The dust cleaning system adopts explosion-proof pulse valves, and the injection pressure is increased to 0.6-0.8MPa to ensure that the aluminum powder particles are completely removed and avoid filter bag blockage.
2. Inert gas protection dust removal system: safety guarantee for high-risk working conditions
For working conditions with high aluminum powder production and concentration, an inert gas protection system is a safer choice. The system uses nitrogen as the circulating medium and introduces aluminum powder dust into the dust collector through a closed pipeline, avoiding contact between aluminum powder and air and eliminating the risk of explosion from the root; The filter bag is made of wear-resistant Nomex material to adapt to pressure fluctuations in nitrogen circulation; Equipped with a gas purification device to remove impurities and dry nitrogen, ensuring efficient recycling.
Selection and operation points of aluminum powder dust removal equipment
1. Explosion proof certification matching: The equipment must pass international authoritative explosion-proof certifications, such as EU ATEX, US UL, China GB15577, etc., to ensure that the explosion-proof level of all components is not lower than II 2D T120 ℃.
2. Details of static electricity prevention and control: All metal parts of the equipment must be reliably grounded, and copper braided tape should be used to cross the pipeline flanges; Prohibit the use of tools that are prone to sparking, and copper tools should be used for maintenance; Set up a static eliminator to preprocess the aluminum powder airflow entering the equipment.
3. Dust concentration control: Install an online dust concentration monitor. When the concentration approaches the lower explosive limit, the alarm device will be automatically activated and the equipment power will be cut off. At the same time, the inert gas replenishment system will be activated to reduce the concentration.
4. Recycling and cleaning design: The dust collection device adopts a conical bottom and a screw conveyor, which facilitates the centralized recycling of aluminum powder; The inner wall of the equipment needs to be polished smooth to avoid dust accumulation; Regularly blow the pipelines and filter bags with compressed air, and thoroughly clean them at least once a week to prevent residual oxidation of aluminum powder.
5. Personnel training and emergency drills: Operators need to receive professional training and master explosion-proof operating procedures; Conduct an emergency drill once a month to ensure that measures such as pressure relief, shutdown, and fire extinguishing can be quickly activated during explosion warnings, reducing accident losses.
The selection of aluminum powder dust removal equipment should prioritize "safety first" and achieve a balance between efficient purification and safe production through multiple measures such as explosion-proof design, electrostatic prevention and control, and concentration monitoring. For overseas enterprises, dust removal equipment that meets international explosion-proof standards is not only a prerequisite for compliant production, but also a key factor in protecting employee safety and reducing operational risks. At the same time, recycling aluminum powder can improve resource utilization, create additional revenue for the enterprise, and establish a safe and efficient production image in the global market competition.
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